μ PC8112TB
11. ILLUSTRATION OF THE TEST CIRCUIT ASSEMBLED ON EVALUATION BOARD
C 3
PS bias
LO
input
C 2
C 4
PS
GND
V CC
L 1
C 6
C 5
Voltage supply
RF
input
C 1
Short
Chip
IF
output
Short Chip = 1 000 pF
Component Number
C 1 to C 5
C 6
L 1
IF 100 MHz Matching
1 000 pF
5 pF
330 nH
IF 240 MHz Matching
1 000 pF
2 pF
84 nH
Remarks
CHIP C
CHIP C
CHIP L
EVALUATION BOARD CHARACTERS AND NOTE
(1) 35 μ m thick double-sided copper clad 35 × 42 × 0.4 mm polyimide board
(2) Back side: GND pattern
(3) Solder plated patterns
(4)
: Through holes
(5) To mount C 6 , pattern should be cut.
Caution Test circuit or print pattern in this sheet is for testing IC characteristics.
They are not an
application circuit or recommended system circuit.
In the case of actual system application, external circuits including print pattern and matching
circuit constant of output port should be designed in accordance with IC’s S-parameters and
environmental components.
Remark External circuits of the IC can be referred to following application notes.
? USAGE AND APPLICATION CHARACTERISTICS OF μ PC2757, μ PC2758, AND μ PC8112, 3-V
POWER SUPPLY, 1.9-GHz FREQUENCY DOWN-CONVERTER ICS FOR MOBILE COMMUNICATION
(Document No. P11997E)
8
Data Sheet P12808EJ3V0DS00
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